rosapps/sysutils/regexpl/ArgumentParser.cpp

   1 /* $Id$
   2  *
   3  * regexpl - Console Registry Explorer
   4  *
   5  * Copyright (C) 2000-2005 Nedko Arnaudov <nedko@users.sourceforge.net>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; see the file COPYING.  If not, write to
  19  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20  * Boston, MA 02111-1307, USA.
  21  */
  22
  23 // ArgumentParser.cpp: implementation of the CArgumentParser class.
  24 //
  25 //////////////////////////////////////////////////////////////////////
  26
  27 #include "ph.h"
  28 #include "ArgumentParser.h"
  29
  30 //////////////////////////////////////////////////////////////////////
  31 // Construction/Destruction
  32 //////////////////////////////////////////////////////////////////////
  33
  34 CArgumentParser::CArgumentParser()
  35 {
  36     m_pchArgumentList = NULL;
  37     m_pchArgumentListEnd = NULL;
  38     m_pchArgument = NULL;
  39 }
  40
  41 CArgumentParser::~CArgumentParser()
  42 {
  43 }
  44
  45 void CArgumentParser::SetArgumentList(TCHAR *pchArguments)
  46 {
  47     TCHAR *pch = m_pchArgumentList = pchArguments;
  48     m_pchArgumentListEnd = pchArguments + _tcslen(pchArguments);
  49
  50     BOOL blnLongArg = FALSE;
  51     while (*pch)
  52     {
  53         switch(*pch)
  54         {
  55         case _T('^'):               // argument parser ignores escape sequences
  56                         if (pch[1])
  57                             pch++;
  58             break;
  59         case _T('\"'):
  60                         blnLongArg = !blnLongArg;
  61             break;
  62         case _T(' '):
  63                     case _T('\t'):
  64                         case _T('\r'):
  65                             case _T('\n'):
  66                                     if (!blnLongArg)
  67                                         *pch = 0;
  68             break;
  69         }
  70         pch++;
  71     }
  72
  73     ResetArgumentIteration();
  74 }
  75
  76 TCHAR * CArgumentParser::GetNextArgument()
  77 {
  78     ASSERT(m_pchArgumentList);          // call SetArgumentList() before calling this function
  79     ASSERT(m_pchArgumentListEnd);       // call SetArgumentList() before calling this function
  80     ASSERT(m_pchArgumentListEnd >= m_pchArgumentList);
  81
  82     // if this is begin of iteration
  83     if (!m_pchArgument)
  84         m_pchArgument = m_pchArgumentList;
  85
  86     while(m_pchArgument)
  87     {
  88         if (m_pchArgument > m_pchArgumentListEnd)
  89         {       // if end of arguments list reached
  90             ASSERT(m_pchArgument - 1 == m_pchArgumentListEnd);
  91             break;
  92         }
  93
  94         TCHAR *pchArg = m_pchArgument;
  95
  96         // Next argument
  97         m_pchArgument += _tcslen(m_pchArgument)+1;
  98
  99         if(*pchArg)
 100         {       // if argument is not an empty string
 101             return pchArg;
 102         }
 103     }
 104
 105     return NULL;
 106 }
 107
 108 void CArgumentParser::ResetArgumentIteration()
 109 {
 110     m_pchArgument = NULL;
 111 }